2026-07-23
Ten Excel Formulas Every Analyst Reuses Constantly
Most spreadsheet work reuses the same handful of formulas. Here's the short list worth actually knowing.
You don't need to memorize hundreds of Excel functions. A small set of lookups, conditional aggregations, and error handlers covers the vast majority of real spreadsheet work — the rest is usually a variation on one of these.
Lookups: VLOOKUP, XLOOKUP, and INDEX+MATCH
VLOOKUP is still everywhere, but it only looks rightward from its lookup column and breaks silently if someone inserts a column in between. XLOOKUP fixes both problems — it can look in any direction and returns a clear #N/A instead of a wrong number when nothing matches.
If you're on a version of Excel without XLOOKUP, INDEX+MATCH does the same job and is worth learning once: MATCH finds the row, INDEX pulls the value from it, and neither one cares which side of the lookup column your answer lives on.
Conditional math: SUMIFS and COUNTIFS
SUMIFS and COUNTIFS handle the question 'total this, but only where these other columns match certain conditions' — total sales for one region in one month, count of orders above a threshold, and similar. They take multiple criteria ranges at once, which plain SUMIF and COUNTIF can't do.
Handling errors and messy text: IFERROR, TRIM, and TEXTJOIN
IFERROR wraps around a formula that might fail — a lookup that doesn't find a match, a division by zero — and lets you show a blank or a custom message instead of an ugly error code spreading through your sheet.
TRIM removes extra spaces that silently break lookups and comparisons (two values that look identical but don't match because one has a trailing space). TEXTJOIN combines several cells into one string with a separator, which is faster than chaining a long string of & operators.
When describing the formula is faster than writing it
For a one-off formula you won't reuse, working out the exact syntax can take longer than just describing what you want. RowMint's Excel Formula Assistant (currently in beta) takes a plain-English description or a broken formula you paste in, and returns a formula plus a short explanation of what it does.
It's a Workers AI model, not a guarantee — always run the result on your real data and check the output before relying on it, the same way you'd check any formula you wrote by hand.
Tools used in this guide
FAQ
What's the actual difference between VLOOKUP and XLOOKUP?
XLOOKUP can search in either direction (not just left-to-right of the lookup column), defaults to an exact match instead of VLOOKUP's error-prone approximate match, and returns a clean #N/A you can control instead of silently returning the wrong row if a column gets inserted.
Does the Formula Assistant write perfect formulas every time?
No — it's an AI model in beta, and like any AI-generated formula it can misunderstand ambiguous requests or produce something syntactically valid but logically wrong. Treat its output as a strong first draft, not a final answer, and test it against real data.
Can the Formula Assistant fix a broken formula I already have?
Yes — paste in the formula that's erroring or behaving unexpectedly and describe what you want it to do instead; it will suggest a corrected version along with a short explanation.